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The TPSR105K025R4000: This molded tantalum capacitor is part of the TPS series, a standard low-ESR line that sees broad use in decoupling and filtering applications across industrial and automotive temperature ranges.
1 µF, 25 V, 4 Ohm ESR — what it means for the BOM
The 4 Ohm ESR (equivalent series resistance) is moderate for a tantalum capacitor of this size; it limits ripple current handling and self-heating, so it suits general-purpose decoupling rather than high-ripple output filtering.
No official pin-compatible alternative is recorded in the KYOCERA AVX TPS series for this capacitance/voltage/package combination — the TPSR105K025R4000 is the direct order code for this spec set.